Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Prediction Today) Pick polygram.ink (preferred broker) |
100% | 0% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Live odds → |
Polymarket (direct) polymarket.com |
100% | 0% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Live odds → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Live odds → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Live odds → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Live odds → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| Completed Match | 100% |
| Cincinnati Open: Stefanos Tsitsipas vs Felix Auger-Aliassime Set 2 O/U 8.5 | 100% |
| Cincinnati Open: Stefanos Tsitsipas vs Felix Auger-Aliassime Set Handicap +/-1.5 | 100% |
| Cincinnati Open: Stefanos Tsitsipas vs Felix Auger-Aliassime Set 1 O/U 8.5 | 100% |
| Cincinnati Open: Stefanos Tsitsipas vs Felix Auger-Aliassime Set 2 O/U 9.5 | 100% |
| Cincinnati Open: Stefanos Tsitsipas vs Felix Auger-Aliassime Set 2 O/U 10.5 | 100% |
| Cincinnati Open: Stefanos Tsitsipas vs Felix Auger-Aliassime | 0% |
| Cincinnati Open: Stefanos Tsitsipas vs Felix Auger-Aliassime Total Sets: O/U 2.5 | 0% |
| Cincinnati Open: Stefanos Tsitsipas vs Felix Auger-Aliassime Match O/U 21.5 | 0% |
| Cincinnati Open: Stefanos Tsitsipas vs Felix Auger-Aliassime Set 1 Winner | 0% |
| Cincinnati Open: Stefanos Tsitsipas vs Felix Auger-Aliassime Set 2 Winner | 0% |
| Cincinnati Open: Stefanos Tsitsipas vs Felix Auger-Aliassime Match O/U 22.5 | 0% |
| Cincinnati Open: Stefanos Tsitsipas vs Felix Auger-Aliassime Set 1 O/U 9.5 | 0% |
| Cincinnati Open: Stefanos Tsitsipas vs Felix Auger-Aliassime Match O/U 23.5 | 0% |
| Cincinnati Open: Stefanos Tsitsipas vs Felix Auger-Aliassime Set 1 O/U 10.5 | 0% |
Market context
Tsitsipas and Auger-Aliassime are scheduled to meet in the Cincinnati Open round of 32 on 16 August 2026. The 18% implied probability for Tsitsipas reflects market expectations heavily favouring the Canadian, though recent form data remains sparse given the event lies months ahead. No material developments have shifted positioning in the past 48 hours; the market has settled into a relatively stable assessment based on career trajectories and recent tournament performance.
Head-to-head records provide limited predictive value here. The pair have met only twice on tour, with Auger-Aliassime holding a 1–1 record. Tsitsipas remains the higher-ranked player historically and has demonstrated greater consistency at Masters 1000 events, where Cincinnati sits. However, Auger-Aliassime's serve-dominant game and improving hard-court record—particularly his 2024–2025 season trajectory—have narrowed the gap between them. Similar matchups involving Tsitsipas against rising North American talent have typically favoured the Greek player, though not decisively.
Traders should monitor both players' injury status and tournament draws as August approaches. Any withdrawal from either competitor would trigger the 50–50 resolution clause. Auger-Aliassime's performance at the US Open (scheduled two weeks after Cincinnati) could influence his preparation and fitness heading into Ohio. Surface conditions at the Lindner Family Tennis Center and seeding announcements in early August will clarify whether either player enters with momentum or fatigue from preceding events.
Methodology
This page reviews Cincinnati Open: Stefanos Tsitsipas vs Felix Auger-Aliassime across five venues. The live probability is the Polymarket mid-price, sourced directly from the on-chain Polygon order book; the comparison columns benchmark each venue on fee structure, KYC, settlement currency and payment rails. Every CTA routes to Prediction Today, which mirrors the Polymarket order book at 0% fees.
Resolution & payout
Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.
Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.
UK Frequently Asked Questions
- Is this market available outside the US?
- Polymarket itself is geo-blocked in the US/UK/EU. Always check the legal status of prediction markets in your jurisdiction before trading.
- What does Polymarket cost to trade?
- Polymarket itself charges 0% — the only cost is the Polygon network fee, typically under $0.01 per transaction. Off-chain venues like Kalshi or Betfair charge 2-7% commission.
- Is Polymarket legal in the UK?
- Polymarket is accessible to UK traders but is not UKGC-licensed. It operates under US CFTC jurisdiction. UK residents face no domestic legal prohibition on using it, but UKGC consumer protections do not apply. For UKGC-regulated alternatives, Betfair Exchange and Smarkets offer similar prediction-style markets.
- Do I pay tax on prediction market profits in the UK?
- UKGC-licensed platform profits (Betfair, Smarkets) are typically tax-free gambling winnings for UK individuals. Polymarket profits involve USDC crypto transactions, which HMRC treats as Capital Gains Tax events. Keep full transaction records and report via Self Assessment if gains exceed £3,000 per tax year.
- How do I deposit on Polymarket from the UK?
- UK traders typically fund Polymarket via Coinbase UK, Kraken or Revolut — buying USDC with GBP and transferring to a Polygon-compatible wallet (MetaMask, Coinbase Wallet). Polymarket's onboarding walks you through the bridging process. Typical GBP-to-USDC conversion costs 0.5–1%.
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